e*thirteen Helix Race Cassette – 12-Speed, 9-45t, Gray Fashion

The e*thirteen Helix R 12-speed cassette is an upgrade to any SRAM‚Ñ¢ Eagle or Shimano‚Ñ¢ drivetrain, and offers more range than other cassette options. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance, but an overall lighter drivetrain.

• Weighs only 319g while offering a 500% gear ratio
• Works flawlessly with Shimano and SRAM drivetrains, including electronic shift systems
• CNC optimized for light weight and wide range
• Helix R is durable and serviceable, with replaceable gear clusters
• Engineered with improved durability of 2 part steel and aluminum assembly
• XD driver compatible